Are the MCAA labor units pretty much industry standard for estimating?

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Are the MCAA labor units pretty much industry standard for estimating?

Question - are is the MCAA Manual of Labor units pretty much the industry standard starting point for estimating?

Talking large commercial/industrial/healthcare etc. projects in the hundreds of thousands and millions of dollars.

If not, then what are the most widely used published standard units?

I know these, and all, labor units and are used as a "starting point" for bidding. Units may be, and quite likely will be, adjusted up or down to suite the job and/or the situation including all kinds of variables.

Just wanting to know if these units are the standard kinda like the NECA units are for electrical contractors.